QmlDesigner: Add qdebugs for commands

Change-Id: I60bdd5b36749be5092d4dabe486b101d62b3df06
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

share/qtcreator/qml/qmlpuppet/commands/valueschangedcommand.cpp

@@ -31,6 +31,7 @@
 
 #include <QSharedMemory>
 #include <QCache>
+#include <QDebug>
 
 #include <cstring>
 
@@ -152,4 +153,11 @@ bool operator ==(const ValuesChangedCommand &first, const ValuesChangedCommand &
     return first.m_valueChangeVector == second.m_valueChangeVector;
 }
 
+QDebug operator <<(QDebug debug, const ValuesChangedCommand &command)
+{
+    return debug.nospace() << "ValuesChangedCommand("
+                    << "keyNumber: " << command.keyNumber() << ", "
+                    << command.valueChanges() << ")";
+}
+
 } // namespace QmlDesigner